lol I’m not arguing here, I definitely would give first prize (the only prize) for RO water, But these overseas countries don’t even drink their tap water.... it's only (mostly) used for washing up... SA has one of the top most cleanest drinking quality water..But it’s no excuse to use it in your marine tank. Darn I need a RO unit....

Some tips for newbies:1.Evaporation top-ups are done with RO water only, not saltwater2.Please don't keep tangs in a nano - they need lots of swimming space3.Anemones need mature tanks to thrive and clown fish don't need anemones to survive4. "Dilution is the solution to polution" - Anthony Calfo

Quality of tap water depends on location.. Like randwater supposed to be really good but not good enough for our reef tanks. I remember a pic of 1 of our durban members, the guy removed the filters from his ro filter and it was black, and that was like after 6months